Remove TEST_MAPPING duplicate imports

The NetworkStack import is already in the duplicate import
clause below it.

This was added by a wrong automerge during the last project
move, and was fixed in some of the downstream branches but
not all. This change should make imports identical in all branches.

Test: treehugger needs to test TEST_MAPPING
Merged-In: I7b5fd61cd551c7010f5b8ceabbfdd04f30f648dd
Merged-In: I71723d3459c14644140b81901dac972b2a746094
Change-Id: I6cbd31506329722d7fa5195a833d7acb4e4787a0
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 7c638a2..adbfacd 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -41,11 +41,6 @@
   ],
   "imports": [
     {
-      "path": "packages/modules/NetworkStack"
-    }
-  ],
-  "imports": [
-    {
       "path": "frameworks/base/core/java/android/net"
     },
     {